NOTE: As their name suggests hints are not exactly Angry Birds cheats, and are usually just simple (but very useful) tips on how you can unlock secret level, features, find hidden areas and such. Hopefully these will make playing Angry Birds even more entertaining.

Achievements
By completing certain objectives in the game, you'll unlock special awards and titles.

Golden Egg 01: Get 3 stars in every level worlds 4-5
Golden Egg 02: In the level select screen, tap the sun
Golden Egg 03: Watch the credits, tap the Golden Egg at the very end
Golden Egg 04: Within any level, go to the help screen. Tap the egg at the end
Golden Egg 05: In Level 1-8, tap the unreachable chest
Golden Egg 06: In Level 2-2, break the beach ball
Golden Egg 07: In Level 4-7,tap the egg at the very top right of the map (zoom out)
Golden Egg 08: In Level 5-19, it's hiding on the top right of the left tower
Golden Egg 09: In Level 6-14, pop the yellow balloon
Golden Egg 10: On level 6-14 pop the yellow balloon in the lower right corner
Golden Egg 11: On theme 8's level page, swipe your finger right to left to reveal a golden egg where theme 9 would be
Golden Egg 12: Get 3 stars for every level in "Danger Above" (themes 6-8)
Golden Egg 13: On level 8-15 break the boxes in the far left corner
Golden Egg 14: On level 9-14 fire the boomerang bird at the hat on the far right side of the screen on the small cliff.
Golden Egg 15: On level 10-3, smash the rubber ducky
Golden Egg 16: On level 11-15, zoom out completely to see the egg in the bottom left corner. Use the boomerang bird fired backwards.
Golden Egg 17: Get 3 stars in all levels on The Big Setup.
Golden Egg 18: On 15-12, Zoom out and shoot a Yellow bird at the top right corner of the screen
Sound Board: Get 3 stars in every level worlds 1-3